"The only way to keep warm was by pouring a mix of boiling water and river water down your suit," Tatum, 29, tells the magazine. "We were finally done shooting for the day, and one of the crew guys asks if I want to warm up before I go. I'm like, Nah, I'm good. And then I thought, Why not?

"Thing is, he'd forgotten to dilute the kettle water," he continues. "So he poured scalding water down my suit. And I was trying to pull the suit away from my body to somehow get away from the boiling water, and the more I pulled the suit away, the lower the water went. It just went straight down and pretty much burned the skin off the head of my dick."

He was rushed to the nearest hospital -- an hour away. On the way, however, the ice pack he was applying to the burn lost its chill.

"I said to the driver, who was ex-special-forces Marines, 'You might have to knock me out, because I don't know if I can take the pain. Just grab something and hit me on the back of my head,'" he recalls.

Morphine eventually did the trick, he says, but it was still embarrassing.